@InProceedings{zhou-xue:2011:LAW,
  author    = {Zhou, Yuping  and  Xue, Nianwen},
  title     = {Discourse-constrained Temporal Annotation},
  booktitle = {Proceedings of the 5th Linguistic Annotation Workshop},
  month     = {June},
  year      = {2011},
  address   = {Portland, Oregon, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {161--169},
  url       = {http://www.aclweb.org/anthology/W11-0420}
}